Hey @malameel - welcome to monday.com community an extension of the monday.com family.
for the quickest way to get answer to your questions you can got to https://support.monday.com/hc/en-us
If you can’t to seem to find the answer there you can email us at email@example.com to get a response within hours!
Our community is where you can go and see what other users of the platforms have discovered and can show others.
In your specific use case, there is not a way to force the column to only display one country but you can remove the flag:
Head over to the column’s setting:
And then choose to show or hide it:
I do want to check to see if this is a bug though. Can you email into firstname.lastname@example.org with the board in questions so we can test out those phone numbers?